This is what the regulation now says:
8. The following grading practices are prohibited:
a) Awarding extra credit and/or bonus points in any manner.
b) Forcing grades into a normal frequency distribution or any other kind of curve that compares students in relation to others.
c) Establishing rating scales that compare students in relation to others (sliding scales are not permitted).
d) Assigning a grade lower than 50 percent to a task/assessment. However, if a student does no work on the task/assessment, the teacher will assign a zero. If a teacher determines the student did not attempt to meet the basic requirements of the task/assessment or the student engaged in academic dishonesty, the teacher may assign a zero.
e) Assigning any single task/assessment that counts for more than 25 percent of the marking period grade.
https://ww2.montgomeryschoolsmd.org/departments/policy/pdf/ikara.pdf